<template>
  <div class="cmt-container">
    <h3>发表评论</h3>
    <hr>
    <textarea placeholder="请输入要BB的内容（做多吐槽120字）" maxlength="120" v-model="msg"></textarea>

    <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>

    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="i">
        <div class="cmt-title">
          第{{i+1}}楼&nbsp;&nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;发表时间：{{ item.add_time | dateFormat }}
        </div>
        <div class="cmt-body">
          {{ item.content === 'undefined' ? '此用户很懒，嘛都没说': item.content }}
        </div>
      </div>

    </div>

    <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
  </div>
</template>

<script>
import { Toast } from "mint-ui";
export default {
  data(){
    return {
      pageindex: 1, //默认显示页码
      comments: [], //评论数据
      msg: '' //获取评论内容
    }
  },
  created(){
    this.getComments();
  },
  methods: {
    getComments(){
      //获取评论
      this.$http.get('api/getcomments/'+ this.$route.params.id +'?pageindex= '+ this.pageindex).then( result => {
          if(result.body.status === 0){
            result.body.message.forEach( (item,i) => {
                item.id = i
            }); 
            this.comments = this.comments.concat(result.body.message)
          }
      }, error => {
        Toast('获取评论失败');
      })
    },
    postComment(){
      if(this.msg.trim() === '')  return Toast('请输入评论内容');
        this.$http.post('api/postcomment/'+ this.$route.params.id,{content: this.msg.trim()}).then( result => {
          if(result.body.status === 0){
              let cmt = {
                user_name: "匿名用户",
                add_time: Date.now(),
                content: this.msg.trim()
              }
              this.comments.unshift(cmt);
              this.msg = '';
          }
        }, error => {
           Toast('提交数据失败!')
        })
    },
    getMore(){
      this.pageindex++;
      this.getComments();
    }
  }
}
</script>

<style lang="scss" scoped>
.cmt-container {
  h3 {
    font-size: 18px;
  }
  textarea {
    font-size: 14px;
    height: 85px;
    margin: 0;
  }

  .cmt-list {
    margin: 5px 0;
    .cmt-item {
      font-size: 13px;
      .cmt-title {
        line-height: 30px;
        background-color: #ccc;
      }
      .cmt-body {
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}
</style>
